Dolphin Reef (known as Blue in France) is an American nature documentary film about dolphins directed by Alastair Fothergill and Keith Scholey and narrated by Natalie Portman. It is the fourteenth nature documentary to be released under the Disneynature label. The film was released theatrically on March 28, 2018 in France under the title Blue with actress Cécile de France providing narration.
It was originally scheduled to be released theatrically on April 20, 2018 in the United States with narration by Owen Wilson, but was confirmed to be taken off the theatrical calendar the week of release. It was then announced that the film would be released at the launch of Disney+, making it the first Disneynature film to be released exclusively on the streaming platform in the United States, but Disney+ launched without Dolphin Reef being available to watch.
The film was finally released alongside Elephant as a Disney+ exclusive on April 3, 2020.